| ⇦ | 
| ⇨ |
A body of weight W newton is at the surface of the earth. Its weight at a height equal to half the radius of the earth will be
Options
(a) W/2
(b) 2W/3
(c) 4W/9
(d) 8W/27
Correct Answer:
4W/9
Explanation:
Let h=height above the earth
R=Radius of earth
Now, the acceleration due to gravity at a height ‘h’ above the earth’s surface(g) is given by
gh=g(1+h/R)⁻²
Given h=R/2
gh=g(1+R/2/R)⁻²
gh/g=1/(1+1/2)²=1/(3/2)²=(2/3)²=4/9
since g=W; gh=4/9g;4/9 W.
.
Related Questions: - The energy of the em waves is of the order of 15 keV. To which part of the spectrum
- The de-Broglie wavelength of an electron is the same as that of a 50 KeV X-ray photon.
- A thin equiconvex lens of refractive index 3/2 and radius of curvature 30 cm
- A nucleus ᴢXᴬ emits an α- particle with velocity v. The recoil speed of the daughter
- Two nuclei are said to be mirror nuclei of
Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The energy of the em waves is of the order of 15 keV. To which part of the spectrum
- The de-Broglie wavelength of an electron is the same as that of a 50 KeV X-ray photon.
- A thin equiconvex lens of refractive index 3/2 and radius of curvature 30 cm
- A nucleus ᴢXᴬ emits an α- particle with velocity v. The recoil speed of the daughter
- Two nuclei are said to be mirror nuclei of
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply